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3. Definitions
7S’s of a Crime Scene
Crime Scene Sketch
Crime Scene Personel
Blood Spatter
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50 Points
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50 Points

4. What is Locard’s Exchange Principle?

5. When two surfaces come into contact, there will always be an exchange between the surfaces

6. What is trace evidence?

7. Physical evidence that is in small but measurable amounts.

8. What is an alibi?

9. Statement of where the suspect was during the time of the crime

10. What is Deductive Reasoning?

11. The process of using information that will remove a person from the suspect pool a.k.a process of elimination

12. What is the difference between a suspect and an accomplice?

13. A suspect is a person thought to be capable of committing the crime…an accomplice is someone who assisted the suspect in the crime

14. What is the first step in the 7S process?

15. Securing the Scene

16. What is the purpose of the second step: Separating Witnesses?

17. To compare accounts of the story

18. What is the last step in the 7S process?

19. Secure Evidence

20. What are the three methods scientists can search for evidence?

21. Spiral
Grid
Quadrant

22. What is the purpose of the third step of the 7S process?

23. To distinguish the primary scene from secondary scenes; to determine what needs to be photographed

24. What conventional units of measurement are used in Crime Scene Sketches? (name all 4)

25. Inches, Feet, Centimeters, Meters

26. What does a crime scene sketch assist with?

27. Interviewing and interrogating personnel; preparing an investigative report; presenting the case in court

28. What are the first two steps in sketching a crime scene?

29. Observe and Plan
Make Measurements

30. What are three characteristics to the rough draft?

31. Includes as much detail as possible
Drawn in pencil
Not drawn to scale
Includes as much detail as possible

32. Name the 7 pieces that belong in the legend.

33. Identifying Information (Key)
Case Number
Type of Crime
Investigator
Persons Assisting
Direction of North
Identifying Information (Key)
Scale

34. This person’s job is to secure the scene so no evidence is destroyed

35. Police Officer

36. This person’s job is to determine if any search warrants are needed

37. District Attorney

38. This person determines the preliminary cause of death

39. Medical Examiner

40. This person is responsible for interviewing the witnesses

41. Detectives

42. This person is responsible for documenting the crime scene in detail

43. Crime Scene Investigators

44. What is another name for projected blood stain?

45. Blood Spatter

46. What is the shape of blood as it forms a drop?

47. Spherical

48. Why does increasing height also increase the diameter of the blood spatter?

49. Gravity causes the drop to accelerate to higher velocities

50. How does the surface tension of blood compare to water?

51. It is a little less than water

52. What are the 5 things blood spatter analysis can tell us about the crime?

53. 1. Distance 2. Location 3. Speed 4. Direction 5. Movement

54. Final Jeopardy
Make your wager

55. Name the 7S Steps in Order

56. 1. Securing the Scene 2. Separating the Witnesses 3
1. Securing the Scene 2. Separating the Witnesses 3. Scanning the Scene 4. Seeing the Scene 5. Sketching the Scene 6. Searching for Evidence 7. Securing and Collecting Evidence